CN214125067U

CN214125067U - Integrated planetary gear motor

Info

Publication number: CN214125067U
Application number: CN202120245028.7U
Authority: CN
Inventors: 牛铭奎; 刘涛; 陆丹
Original assignee: ZHEJIANG FOUNDER MOTOR CO Ltd
Current assignee: ZHEJIANG FOUNDER MOTOR CO Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-09-03
Anticipated expiration: 2031-01-28

Abstract

The utility model relates to an integrated planetary gear motor, which comprises a large motor body, a planetary gear mechanism, a small motor driving mechanism and an output gear, wherein the large motor body is in transmission connection with the output gear through the planetary gear mechanism arranged at one end of the large motor body; the small motor driving mechanism is arranged at one end of the large motor body and is in transmission connection with the planetary speed reducing mechanism. The utility model has the advantages that the big motor and the small motor are respectively matched with the planetary reduction mechanism, so that the small motor can output when the automobile creeps at low speed, the problem of low efficiency of the planetary integrated big motor at low rotating speed is solved, the energy loss is reduced, and the energy is saved and the emission is reduced; simultaneously, the structure can ensure that the large motor is in the best working state: torque fluctuation caused by road condition fluctuation changes, and compensation increment of the small motor keep the output of the large motor stable.

Description

Integrated planetary gear motor

Technical Field

The utility model belongs to the technical field of vehicle motor and specifically relates to a planetary gear motor of integrated form is related to.

Background

The motor for an electric vehicle is characterized by a high rotational speed and a low torque. The power form required by the vehicle is low rotating speed and large torque, and the torque variation range of the motor serving as a driving source generally cannot meet the requirement of the vehicle running performance in the actual running process of the electric vehicle. Under the given rated power of the motor, if the constant power range is not enough to generate high traction force under the condition of low rotating speed, a mechanical reduction box or a gearbox is required to be arranged between the motor and a driving wheel to meet the requirement of the variation range of the running resistance of the electric automobile, and simultaneously, the loads of the motor and a power battery pack are lightened, and the working efficiency is improved.

In the prior art, the publication number CN205647173U discloses an integrated motor for a planetary reduction vehicle, which directly integrates a planetary reduction mechanism on the output end of the motor to improve the output torque of the motor, so as to meet the requirement of power of an electric vehicle; the integrated motor has the advantages of simple structure, large speed ratio, small size and light weight, and can make the whole vehicle more compact after being applied to an electric vehicle, thereby being beneficial to the miniaturization and lightweight design of the vehicle, reducing the vehicle cost and improving the competitiveness of the vehicle. However, when the automobile creeps at a low speed by adopting the structure, the motor efficiency is lower and the energy loss is larger; and when the road conditions are complicated, the motor output of the structure is frequently changed, and the service life of the motor is greatly influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide an integrated form planetary gear motor, this motor satisfies the demand under the different forms operating mode, and efficiency is higher.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

an integrated planetary gear motor comprises a large motor body, a planetary gear mechanism, a small motor driving mechanism and an output gear, wherein the large motor body is in transmission connection with the output gear through the planetary gear mechanism arranged at one end of the large motor body; the small motor driving mechanism is arranged at one end of the large motor body and is in transmission connection with the planetary speed reducing mechanism.

Preferably, the large motor body comprises a shell, and a motor stator assembly and a motor rotor assembly which are arranged in the shell.

Preferably, the housing comprises a motor housing, and a middle housing and a motor end cover which are fixed on the motor housing, the motor stator assembly and the motor rotor assembly are arranged in a space formed by the motor housing and the middle housing, and the planetary reduction mechanism is arranged in a space formed by the middle housing and the motor end cover.

As a preferred scheme, the planetary reduction mechanism comprises a sun gear, a planetary gear, a planet carrier and a gear ring frame, the sun gear is connected with the motor rotor assembly, the gear ring frame is rotatably arranged in the shell, inner ring teeth and outer ring teeth are arranged on the gear ring frame, the gear ring frame is in transmission with the sun gear through the planetary gear, and the planetary gear is in transmission with the output gear through the planet carrier.

Preferably, a thrust bearing is arranged between one end of the planet carrier and the gear ring frame, and a wave spring is arranged between the other end of the planet carrier and the gear ring frame.

Preferably, the small motor driving mechanism comprises a direct-drive motor or a motor with speed reduction and a small motor output gear, and the small motor output gear is in meshing transmission with outer ring teeth of the gear ring frame.

Preferably, the gear ring frame is rotatably arranged on the middle shell through a rolling bearing, and an oil seal is further arranged on the motor end cover.

Preferably, the planetary gear has three inner ring teeth arranged in a regular triangle in the gear ring frame, and the inner ring teeth and the outer ring teeth are respectively welded and fixed on the inner side and the outer side of the gear ring frame.

The utility model discloses a big motor, little motor respectively with planetary reduction gears's cooperation, make the utility model has four following advantages: 1. under the limit working condition, the large motor and the small motor output increased torque simultaneously, so that the driving force of the automobile is improved, and the power requirement of the automobile is met; 2. when the automobile creeps at a low speed, the small motor can output power, so that the problem of low efficiency of the planetary integrated large motor at a low rotating speed is solved, energy loss is reduced, energy is saved, and emission is reduced; 3. the large motor is in the best working state: torque fluctuation caused by road condition fluctuation changes, and compensation increment of the small motor keeps the output of the large motor stable; 4. the motor and the planet row speed reducing mechanism are integrated, so that the weight of the planet row motor is reduced, the speed ratio is increased, the structure is compact, the manufacture is convenient, the working procedures are reduced, the process is simple, and the manufacturing cost is reduced to some extent.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic view of the overall structure of the present invention.

The reference numbers in the figures are: 1. a large motor body; 2. a planetary reduction mechanism; 3. a small motor drive mechanism; 4. an output gear; 10. a motor housing; 11. a motor end cover; 12. a motor stator assembly; 13. a motor rotor assembly; 14. a middle housing; 15. a rolling bearing; 16. oil sealing; 17. a bolt; 21. inner ring teeth; 22. a rack and pinion rack; 23. a sun gear; 24. a planetary gear; 25. a planet carrier; 26. a thrust bearing; 27. a wave spring; 31. a direct drive motor; 32. the small motor outputs the gear.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise.

Furthermore, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The invention will be further explained with reference to the following embodiments and drawings:

as shown in fig. 1, the integrated planetary reduction motor comprises a large motor body 1, a planetary reduction mechanism 2, a small motor driving mechanism 3 and an output gear 4, wherein the large motor body 1 is in transmission connection with the output gear 4 through the planetary reduction mechanism 2 arranged at one end of the large motor body 1; the small motor driving mechanism 3 is arranged at one end of the large motor body 1 and is in transmission connection with the planetary speed reducing mechanism 2.

The large motor body 1 comprises a shell, and a motor stator assembly 12 and a motor rotor assembly 13 which are arranged in the shell. The casing includes motor casing 10 to and fix middle casing 14 and motor end cover 11 on motor casing 10 through bolt 17, motor stator assembly 12 and motor rotor assembly 13 set up in the space that motor casing 10 and middle casing 14 formed, planetary reduction mechanism 2 sets up in the space that middle casing 14 and motor end cover 11 formed.

Planetary reduction mechanism 2 includes sun gear 23, planetary gear 24, planet carrier 25 and ring gear frame 22, sun gear 23 is connected with electric motor rotor assembly 13, ring gear frame 22 rotates and sets up in the casing, and is equipped with inner ring tooth 21 and outer lane tooth on ring gear frame 22, ring gear frame 22 passes through planetary gear 24 and sun gear 23 transmission, planetary gear 24 passes through planet carrier 25 and output gear 4 transmission.

A thrust bearing 26 is arranged between one end of the planet carrier 25 and the gear ring frame 22, and a wave spring 27 is arranged between the other end of the planet carrier and the gear ring frame 22. The structure can prevent the planet carrier from axially moving, and the wave spring 27 provides pretightening force for the thrust bearing 26.

The ring gear 22 is rotatably disposed on the middle housing 14 through a rolling bearing 15, so that the middle housing 14 supports the entire planetary reduction mechanism 2, and the motor end cover 11 is further provided with an oil seal 16, and the oil seal 16 seals oil inside the entire planetary reduction mechanism 2.

The planetary gear 24 has three inner ring teeth 21 arranged in a regular triangle in the ring gear 22, and the inner ring teeth 21 and the outer ring teeth are welded and fixed on the inner side and the outer side of the ring gear 22.

The small motor driving mechanism 3 is directly inserted into the planetary reduction mechanism 2 as an external component and is fixed on the motor end cover 11 by bolts. The small motor driving mechanism 3 comprises a direct-drive motor 31 or a motor with speed reduction and a small motor output gear 32, and the small motor output gear 32 is in meshing transmission with outer ring teeth of the gear ring frame 22.

In general, when the small motor driving mechanism 3 is in standby, the large motor body rotates the sun gear 21, and the planet carrier 25 outputs power; under the limit working condition, the large motor and the small motor output increased torque simultaneously, so that the driving force of the automobile is improved, and the power requirement of the automobile is met; when the automobile creeps at low speed; the small motor driving mechanism 3 can output independently, so that the problem of low efficiency of the planetary integrated large motor at low rotating speed is solved, energy loss is reduced, energy is saved, and emission is reduced; in addition, when the torque fluctuation caused by the road condition fluctuation changes, the small motor driving mechanism 3 compensates the increment, so that the output of the large motor body is kept stable.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and that any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. The integrated planetary gear motor is characterized by comprising a large motor body (1), a planetary gear mechanism (2), a small motor driving mechanism (3) and an output gear (4), wherein the large motor body (1) is in transmission connection with the output gear (4) through the planetary gear mechanism (2) arranged at one end of the large motor body (1); the small motor driving mechanism (3) is arranged at one end of the large motor body (1) and is in transmission connection with the planetary speed reducing mechanism (2).

2. An integrated planetary gear motor according to claim 1, wherein the large motor body (1) comprises a housing, and a motor stator assembly (12) and a motor rotor assembly (13) arranged in the housing.

3. An integrated planetary reduction motor according to claim 2, wherein the housing comprises a motor casing (10), and an intermediate housing (14) and a motor end cover (11) fixed on the motor casing (10), the motor stator assembly (12) and the motor rotor assembly (13) are arranged in a space formed by the motor casing (10) and the intermediate housing (14), and the planetary reduction mechanism (2) is arranged in a space formed by the intermediate housing (14) and the motor end cover (11).

4. An integrated planetary gear reducer according to claim 3, wherein the planetary gear reducer (2) comprises a sun gear (23), a planetary gear (24), a planet carrier (25) and a gear ring carrier (22), the sun gear (23) is connected with the motor rotor assembly (13), the gear ring carrier (22) is rotatably arranged in the housing, inner ring teeth (21) and outer ring teeth are arranged on the gear ring carrier (22), the gear ring carrier (22) is in transmission with the sun gear (23) through the planetary gear (24), and the planetary gear (24) is in transmission with the output gear (4) through the planet carrier (25).

5. An integrated planetary gear reduction motor according to claim 4, wherein a thrust bearing (26) is provided between one end of the planet carrier (25) and the ring gear carrier (22), and a wave spring (27) is provided between the other end and the ring gear carrier (22).

6. An integrated planetary gear motor according to claim 4, wherein the small motor driving mechanism (3) comprises a direct-drive motor (31) or a motor with speed reduction and a small motor output gear (32), and the small motor output gear (32) is in meshing transmission with the outer ring teeth of the gear ring frame (22).

7. An integrated planetary gear motor according to claim 4, wherein the ring gear rack (22) is rotatably arranged on the middle shell (14) through a rolling bearing (15), and an oil seal (16) is further arranged on the motor end cover (11).

8. An integrated planetary reduction motor according to claim 4, wherein the planetary gear (24) has three inner ring teeth (21) arranged in a regular triangle in the gear ring rack (22), and the inner ring teeth (21) and the outer ring teeth are welded and fixed on the inner side and the outer side of the gear ring rack (22), respectively.